<!doctype html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Bootstrap demo</title>
  <!-- 引入CSS -->
  <link href="bootstrap/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>
  <div class="container mt-3">
    <div class="alert alert-primary" role="alert">
      A simple primary alert—check it out!
    </div>
    <div class="alert alert-secondary" role="alert">
      A simple secondary alert—check it out!
    </div>
    <div class="alert alert-success" role="alert">
      A simple success alert—check it out!
    </div>
    <div class="alert alert-danger" role="alert">
      A simple danger alert—check it out!
    </div>
    <div class="alert alert-warning" role="alert">
      A simple warning alert—check it out!
    </div>
    <div class="alert alert-info" role="alert">
      A simple info alert—check it out!
    </div>
    <div class="alert alert-light" role="alert">
      A simple light alert—check it out!
    </div>
    <div class="alert alert-dark" role="alert">
      A simple dark alert—check it out!
    </div>
  </div>

  <!-- 引入JS -->
  <script src="bootstrap-5.2.3-dist/js/bootstrap.min.js"></script>
</body>

</html>